[jauer]

On the off chance that it was a beach ball instead of a outright crash, apparently there's some cache generation that happens on first run on OSX 10.9+. It started working after ~5 minutes of beachball on my 2011 MBA.

[Milanium]

This has been fixed in https://github.com/OpenRA/OpenRA/pull/5244 and will be shipped in the next version.